/*
C#: The Complete Reference
by Herbert Schildt
Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/
// Demonstrate a virtual method.
using System;
class Base {
// Create virtual method in the base class.
public virtual void who() {
Console.WriteLine("who() in Base");
}
}
class Derived1 : Base {
// Override who() in a derived class.
public override void who() {
Console.WriteLine("who() in Derived1");
}
}
class Derived2 : Base {
// Override who() again in another derived class.
public override void who() {
Console.WriteLine("who() in Derived2");
}
}
public class OverrideDemo {
public static void Main() {
Base baseOb = new Base();
Derived1 dOb1 = new Derived1();
Derived2 dOb2 = new Derived2();
Base baseRef; // a base-class reference
baseRef = baseOb;
baseRef.who();
baseRef = dOb1;
baseRef.who();
baseRef = dOb2;
baseRef.who();
}
}
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